{"created":"2023-06-19T12:46:48.662262+00:00","id":6902,"links":{},"metadata":{"_buckets":{"deposit":"e5236e76-129c-4a4c-92b7-0f35d5165a53"},"_deposit":{"created_by":3,"id":"6902","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"6902"},"status":"published"},"_oai":{"id":"oai:tokyo-metro-u.repo.nii.ac.jp:00006902","sets":["656:687:688:1278:1564"]},"author_link":["22462","22461"],"item_2_alternative_title_19":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Reliability of the evaluation of gluteus maximus activity using share wave elastography"}]},"item_2_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2018-03-25","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"20","bibliographicPageStart":"1","bibliographic_titles":[{}]}]},"item_2_creator_2":{"attribute_name":"著者(ヨミ)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"ハヤシ, トモノリ"}],"nameIdentifiers":[{"nameIdentifier":"22462","nameIdentifierScheme":"WEKO"}]}]},"item_2_date_granted_66":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2018-03-25"}]},"item_2_degree_grantor_64":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_name":"首都大学東京"}]}]},"item_2_degree_name_63":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"修士（健康科学）"}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"背景: 骨格筋の硬さの客観的な測定方法としては,従来では触診による定性的な評価や,機器を体表から押し込んだ時の変異量を計測する検討が行われてきた.しかし,これらは皮膚や皮下脂肪と筋の双方の硬さを総合的に反映しているため,筋実質の硬さを直接反映しているとは言い難い.近年,軟部組織の形態評価ツールとして,せん断波エラストグラフィ(Shear Wave Elastography: SWE)が注目されている.SWEは,超音波パルスによる音響放射圧を用いて生体内でせん断波を生成させ,伝播速度を捉えることで硬さを得ることが出来る.SWEは,筋の状態評価ツールとして近年頻繁に使用されるようになり,臨床的有用性も明らかになってきたが,深層の軟部組織に対してはせん断波の減衰率が大きくなり,測定値の信頼性は低くなることが報告されている.そこで今回,超音波ファントムを用い,骨格筋を評価するための適切な深度を検証する事とともに,被検者を用いて大殿筋の弾性率の計測を行い,同一深度で正確な弾性率評価が可能かどうかを検証する事を研究目的とした.方法: 超音波画像診断装置(中心周波数9MHz)を用い計測を行った.超音波ファントムの計測は,健常成人6名を検者とした.検者は,超音波ファントムの3種類のスコアの弾性率計測をランダムな順序で実施した.各スコアの大きさに関心領域を設定し静止画を撮像した後,弾性率を計測した.表層から深さ2cmにあるスコアの弾性率計測後,深さ7cmにあるスコアも同じ手順で弾性率計測を行った.大殿筋の計測対象は,健常成人6名の左下肢とした.測定手順は,同一検者が被検者の安静時における大殿筋の内側,中間,外側部の弾性率を計測し,その後5秒間大殿筋に随意収縮を生じさせた際の各部位の弾性率を計測した.結果: 超音波ファントムを用いた計測では,深さ2cmにおいて検者間の測定データのばらつきが少なく信頼性が高いと考えられた.一方,深さ7cmでは測定データのばらつきが大きく信頼性が低いと考えられた.また,被験者を用いた大殿筋の評価では,深さ2cmであれば測定部位に関係なく弾性率評価を行うことが出来,測定データのばらつきも少なく信頼性の高い評価が可能と考えた.結論: 一般的に測定対象が深層の場合,超音波パルスの減衰率が大きくなり,評価の信頼性が低くなるとされているが,本研究と同じSWEを用い筋の弾性率評価を行う際,深さ2cmであれば,信頼性の高い弾性率計測が出来る事が示唆された.","subitem_description_type":"Abstract"},{"subitem_description":"Background and Purpose. Although muscle hardness meter measuring displacement during skin pressing is widely adopted for the evaluation of muscle stiffness, the measured stiffness values might be not only reflected muscle hardness, but also affected with stiffness of the other tissues and strength of the pressing probe. Recently, Shear Wave Elastography (SWE) has been recognized as a method to accurately evaluate only muscle stiffness. SWE is an ultrasound technique that evaluates hardness by measuring shear wave speed. However, the shear wave amplitude is known to decrease dependent on the depth of the target. The purpose of the present study was to determine the depth of the field for appropriate measurement of the muscle stiffness. Methods. A 9MHz frequency ultrasound device was used for detection of tissue imaging. Six male healthy adults who have not had any history of orthopedic disease were subjected. The study task to the subjects was randomly measuring the ultrasound phantom located at both 2 and 7 cm depth by using SWE. Also, the stiffness of inside, middle and outside of the gluteus maximus of left lower extremities of the subjects were measured using SWE. Results. The measured stiffiesses of the phantom using SWE were well correlated with the materials' hardness at 2cm depth, but not at 7 cm. The coefficient of elasticity of the inside, middle and outside portion of the gluteus maximus at the 2cm depth of each subjects were similar, and the extent of the increase in the coefficient induced by muscle contraction in each portion was also similar and significant. Conclusion. The present results indicate that SWE is a useful technique to accurately evaluate muscle stiffness at 2cm depth.","subitem_description_type":"Abstract"}]},"item_2_description_5":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"首都大学東京, 2018-03-25, 修士（健康科学）","subitem_description_type":"Other"}]},"item_2_version_type_16":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_ab4af688f83e57aa","subitem_version_type":"AM"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"林, 友則"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-10-09"}],"displaytype":"detail","filename":"T01536-001.pdf","filesize":[{"value":"3.0 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"T01536-001.pdf","url":"https://tokyo-metro-u.repo.nii.ac.jp/record/6902/files/T01536-001.pdf"},"version_id":"1c83a9ab-485a-4e84-9928-210656b6700f"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"超音波","subitem_subject_scheme":"Other"},{"subitem_subject":"筋硬度","subitem_subject_scheme":"Other"},{"subitem_subject":"骨格筋","subitem_subject_scheme":"Other"},{"subitem_subject":"Ultrasound echo","subitem_subject_scheme":"Other"},{"subitem_subject":"muscle stiffness","subitem_subject_scheme":"Other"},{"subitem_subject":"skeletal muscle","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"thesis","resourceuri":"http://purl.org/coar/resource_type/c_46ec"}]},"item_title":"超音波エラストグラフィを用いた大殿筋の活動状態評価の信頼性","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"超音波エラストグラフィを用いた大殿筋の活動状態評価の信頼性"}]},"item_type_id":"2","owner":"3","path":["1564"],"pubdate":{"attribute_name":"公開日","attribute_value":"2018-10-23"},"publish_date":"2018-10-23","publish_status":"0","recid":"6902","relation_version_is_last":true,"title":["超音波エラストグラフィを用いた大殿筋の活動状態評価の信頼性"],"weko_creator_id":"3","weko_shared_id":-1},"updated":"2023-06-19T16:25:55.196758+00:00"}